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18
DVD-S540/DV-S5650
DVD-S540
DV-S5650
B
When read disc,
Laser on OK ?
No
Signal
LDO1 and LDO2 are
normal ?
Voltage of
TP22 &TP24
OK ?
Check the circuit to
connect DVD mechanism
or Optical Pick Up maybe damaged
Check the peripheral
circuit of MT1336E
Check the peripheral
circuit of two transistor
(Ref 7620 & 7621)
Check the peripheral
circuit of two transistor
(Ref 7620 & 7621)
No
No
Yes
Yes
Load a disc ?
Yes
Laser off
No
Focus on OK ?
Yes
No
Signal FEO
(pin 18 of MT1336E)
correct ?
Check the circuit from
Pin18 of MT1336E to Pin 205
of MT1379BE
Check the circuit between
Optical Pick Up and MT1336E
Check the peripheral
circuit of MT1336E
No
No
Yes
Yes
Any signal
on pins A B C D E F
of MT1336E
Disc ID correct ?
Yes
No
Check the circuit from
Pin 19 of MT1336E to Pin 206
of MT1379BE
Check the peripheral
circuit of MT1336E and
itself.
No
Signal of
Pin 19 (RFL) of MT1336E
normal ?
Yes
No
Signal SP+
(Pin 11 of BA5954) & SP-
(Pin 12 of BA5954)
correct ?
Check the connection
between spindle driver and
BA5954
Check BA5954 (motor
driver) and its peripheral
circuit
No
No
Yes
Yes
DMSO
(pin 18 of MT1379BE)
normal ?
Check MT1379BE and its
peripheral circuit.
C
Board
Ref
Name
MONO
7602
MT1336E
MONO
7603
BA5954
MONO
7606
MT1379BE
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TEL 13942296513 QQ 376315150 892498299
TEL 13942296513 QQ 376315150 892498299